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KMS activation error 0x80070426

Question

We have a few Server 2008 R2 Standard Edition servers that have recently begun to fail KMS activation. Many other equivalent servers in the environment continue to activate with no problem. There are no errors reported on the KMS host side.

I'm pasting the report from MGADiag.exe 1.9.0027.0 below. Please let me know if other information is required, and thanks!